Drupal

Drupal is an open source content management platform for building websites, from personal weblogs to large community-driven sites. It helps teams manage site content and extend a site without starting from scratch.

Drupal can be extended with thousands of free and open source modules that add features such as content types, views, user roles, and integrations. Its themable presentation layer separates markup and styling from content, so the same site can be restyled without changing its structure.

Drupal is built around a role-based access control system and content modeling that scales from a single blog to large multi-site installations. It is backed by a broad provider ecosystem for design, development, and hosting services, with published security advisories for the core and contributed modules.